Sentence examples for ancient atmosphere from inspiring English sources

The presence of large quantities of reduced (hydrogen-rich) minerals, such as uraninite and pyrite, that were exposed to the ancient atmosphere in sediments formed over two billion years ago implies that atmospheric conditions then were considerably less oxidizing than they are today.

To study the ancient atmosphere, geochemists examine the chemical fingerprints left behind on rocks.

You do feel you are away from the ancient atmosphere of the city.

Yet very little is known about how thick Earth's ancient atmosphere once was.

"People modeling the ancient atmosphere of Earth should think about that".

Scientists have long assumed that Earth's ancient atmosphere had a stronger greenhouse than today's.

Martinerie, P., Brasseur, G. P. & Granier, C. The chemical composition of ancient atmospheres: A model study constrained by ice core data.

There he developed the use of stomata (gas exchange pores) on fossil plants to reconstruct levels of carbon dioxide in ancient atmospheres.

He also became interested in forest fires in ecosystems of the past, and the use of fossil charcoal to estimate the concentration of oxygen in ancient atmospheres.

Fossils and other structural and chemical details of ancient rocks provide information useful to evolutionary biologists and historical geologists, but ancient atmospheres, "mere vapours," have not left such substantial remnants.

These data and numerical Earth system models are used to determine the composition of ancient atmospheres, ocean chemistry and temperatures, with a focus on the global carbon cycle,the history of atmospheric oxygen, and paleoclimates.